摘要 在电场中工作的阵列电场传感器之间会产生相互干扰,从而影响电场测量精度。传统的解决方法是增大传感器间距,但该方法不适用于有限的空间。针对该问题,文中提出了一种带屏蔽环的电场传感器。通过屏蔽环可以减少传感器间的相互干扰,从而提高传感器的一致性。首先,通过在均匀电场下对两个带屏蔽环的传感器进行仿真得到其上极板平均场强的差值;然后将传感器换为等面积不带屏蔽环的传感器进行取差。仿真结果表明,带屏蔽环的传感器一致性高于不带屏蔽环的传感器。通过改变屏蔽环的宽度,从1~6 mm仿真得到使传感器一致性最高的屏蔽环宽度为5 mm。按照仿真结果,利用PCB工艺制作传感器,并设计调理电路。最终将传感器进行标定,得到较高的灵敏度43.215 mV/kV·m-1以及拟合度0.9991。 Array electric field sensors that work in an electric field produce interference with each other,affecting the accuracy of electric field measurement.The traditional solution is to increase the sensor spacing,but not in limited space.In view of this problem,an electric field sensor with shielding ring is proposed,which can reduce the interference between sensors,thus improving the consistency of the sensor.First,by simulating the two sensors with shielded rings under the uniform electric field,the difference between the average field strength of the upper plate is obtained,and then the sensor is changed to the sensor without the shielding ring in the equal area.The simulation results show that the sensor consistency with shielded ring is higher than that without the shielding ring.By changing the width of the shield ring from 1~6 mm simulation,the shield ring width with the highest sensor consistency is 5 mm.According to the simulation results,the sensor is made by PCB process,and the conditioning circuit is designed.Finally,the sensor is calibrated to obtain a higher sensitivity of 43.215 mV/kV·m,and a fitting degree of 0.9991.
出处 《电子科技》 2021年第6期40-44,共5页 Electronic Science and Technology
基金 南方电网公司科技项目(2016KF00035)。
关键词 传感器间距 均匀电场 屏蔽环 调理电路 电场传感器 一致性 sensor spacing uniform electric field shielding ring conditioning circuit electric field sensor consistency
